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2004.06.28 CHAPTER 1: Using DelphNav™ (Survey Control Panel) 51

Using Delph Nav An Example of Survey Planning in DelphNav

The data in this sample exercise is as follows:

• a DXF coastline file from Portland Maine (portland.dxf), which has metric coor-

dinate information based on the UTM projection and the NAD27 datum

• a number of lines in an ASCII file based on UTM projection and the WGS1984 datum

(portland_lines.txt), with the coordinates in meters

We will assume that the navigation input will be from a GPS receiver with an output in lat-

itude and longitude using the WGS84 datum. And that the final project requirement is for

a UTM projection in meters.

Importing a DXF file with Coastline (or Other) Data

Any information — such as coastlines, pipeline routes, or cable routes that could be

represented as line (vector) data — can be imported and displayed in DelphNav as a DXF

file.

To import a coastline data (or other data) as a DXF file

Important: DelphNav at this time only imports ASCII DXF files in the AutoCAD R12 for-

mat.

1. Click

Project → Insert Layers and use the pull-down arrow to select ASCII AutoCAD

files (*.DXF)

The system displays an Open dialog box (Figure 29).

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Triton TritonNav Bedienungsanleitung Seite 57